Also consider fact, that our system performs check on existing miners every 10 minutes. The stats on page may change and you still work on old algo. This is to prevent too often switches, which reduce miners performance.

We are still waiting from sgminer devs to increase pool check interval for multialgo configs from 30 seconds up to 10 minutes, because now, your miner will switch in 30 seconds if top priority algorithm appears alive instead after several minutes as it was meant to be.